Ellipsograph



Oct. 27, 1925. 1,559,079

H. FALLETTA ELLIPSOGRAPH Filed Jan. 26, 1924 INVENTOR HecovFalleta v ATTORNEY.

Patented Oct. 27, 1925.

UNITEDH'STATEs-ij PATENT* OFFICE. l

Y HECTOR FALLETTA, oF Los ANGELES, CALIFORNM.

' ELLIrsoGRAPH.

Application ledJanuary 26, 1924. YSerial No. 688,680.

210 all whom t may concerti. 'Y

" Be it known that I, HECTOR FALLETTA, a'

citizen of Italy, residing at LosAngeles, in

the county of Los Angeles and State of California, have invented new and useful'Improvements in Ellips'ographs, ofjwhich thev may be made therein Vwithout departing. my invention as herein from the spiritl of after claimed.

Referring to the annexed drawing which forms a part of this specification:

Fig. 1 is a -plan view of my instrument shown in the act of drawing an ellipse.

Fig. 2 is a side elevation as shown in Fig/1. 'Fig.*3isan edge View of the lower portion of one leg of the foci dividers ofmy instrument.

Fig. I is a side View of saidrlowerv portion of said leg.

and chain carrier.

Fig. 6 'is a longitudinal section of the:

marker and chain carrier. Y f

Fig. 7 is a view of the lower portion ofV the marker and chain carrier. y

Fig. 8 is a horizontal section Vof my instrument taken on line 88 of Fig. 2.

My instrument comprises a foci element L5 such as a pair of ellipse foci dividers 1, a vmarker and guide cha1n-` carrier 2,fand a guide chain 3.

per ends by pivot 5, a handle 6 pivoted to P0 said legs by said pivot, and feet'7 pivoted at y8 tothe lower ends of said legs. Each ofl my instrument Fig. 5 is a side elevationv of the marker Said dividers comprise a pair of vlegs i ,pivoted together at their up-` .leg 4 may made in a plurality of sections, l 'l such as an `upper section 9vandv a lowerlsecytion 10which sectionsarejoined together by-a telescopic joint llincluding a set screw y12f-for securing'said sections together.

Each foot- .Zrhas a flat treadV plate 13,'which restsupon thel surface upon which the ellipse 1s to .be drawn and support the dividers.

Upstanding foci pins 14 are formed ontherY plates13 and heads 15 kare formed on the upper ends of saidpins. i Depending points 16 are formed on the extremities of the tread `plates 13 for stick-O ing into the surface on which the ellipse is to be drawn for properly holding the dividers 1 on said surface with' the foci pins 14' properly spaced to determine-the foci ofthe ellipse to be drawn. The markeriand .guide vchaincarrier 2 comprisesfajbarrel 17 rovided with a longitudinal bore 18 exten ing therethrough and formed'in two sections 19 andy 20 coupled together by .a swivel cou- Y pling 21 and achain reel 22 journaled inv The coupling 23and a fe the upper end of said barrel. 21A comprises a male member male memberi'24.

The male coupling member 23is` threaded 'toscrew into a threaded socket 25 .inl the upper end-of the lower marker member 19,k

Aand said coupling member has an external annularflange 26 formed on the -upper end Y thereof. The female coupling member 24 :is internally threaded to screw onto the reduced lower threaded end 27 of the upper. #.marker member 20. The lower end ,of the female member 2,4. 'is closed by awall 28 in which is provided a central opening through which extends the l*male member 23 .with the flange 26 thereof engaging the inner and upper sidegof said Y marker member 19 to turn with relation to the upper marker member 20. The reel 22 is secured on a shaft 30 journaledy in the 'upper end of the marker member in bearings 31. A ratchet wheel 32 is-secured on one end of shaft 30 at one side of the marker and a thumb wheel 33 is secured on the other end of said shaft at the lother side of the wall 27. The Ycoupling 21 permitsthe lower marker. A pawl 34 is pivoted on the upper Y partfof the mark. at the side at which "the j ratchet 32 is mountec, which pawl engages said ratchet, there being a handle 35 on said awl for disengaging the same from said ratchet and a spring 36 secured to the marker engages said `handle and normally maintains said pawl in engagement with Vsaid ratchet and prevents rotation of reel 22 and unwinding of the chain 3 therefrom, one end of the chain being wound on said reel. Said chain extends downwardly through the bore 18 and its other end is secured to an eye 37v on the lower pointed end SSS-,of the marker. screw clamp 4() is formed on the lower member 1910i' the marker 2 on the side thereof opposite* the side von which the eye 37y is formed in which clamp `either a pencil 41 or a pen 42 is clamped at its upper endi43 or 44, so that 'the point 45 or 46 or' said pencilorfsaidpen rests adjacent the point-38 of the marker and'on the side ot said point.

opposite the side on which the eye 37 is formed.

In operation a sufficient amount of chain 3 is let ott' the reel 22 to form a loop 50, which is extended` around the ioci pins 14 with the point 45 or 46 of the pencil 41 or pen 42 outside said-loop, the. divideis l be ing adjusted and placed onl the suriiace on which thefellipse is to be drawn with the toci'pins 14 properly positioned for. the ellipse desired, -andfthe points 16 stuck into said surface and holding said dividers in such positiom rlhe loop` 450 `1may-be adjusted .to `the proper size for the reel 22 bythe thumbwheel 33 `and winding up the chain on said-reel or unwinding thel chain therefrom, the pawli 34 being :released from the ratchet 32 when the reelis turned to unwind the chain toenlarge the loop.

The marker 2 being held byy its upper member 20, 4it is held-'outward as ar as pos-V sible with theA chain `3 taut and is. carried around the oci pins 14 until theY complete ellipse 51 is drawn `about said oc'i`the cou;- pling`2lpermitting the `lower marker ,member Y19 'to 1turn with relation Vtothe :upper member 20 as said `foci pins, thus facilitating lthe drafting of the ellipse.

Having described 'my invention, I claim:

1. Ahn comprising a pair of. dividers having legs in combination with a marker holder .and `a guide chain, a foot on each leg of said'dividers, va iixing point :and a `focus pin on each oit said feet, a swivel jo-int in lsaid marker holder, a Amarker fixed in said marker holder below saidV swivel jointfand adjustablemeans for attaching one end of saidl chain Lto -said lmarker holder whereby the chain maybe loopedaround said Jfocus pinsuto serve asa guide for said marker in ltracing ellipses of different forms `and sizes.

A said chainwhereby when desired 'loop by turning thexadapted to beheld by an operator the marker :travels `around,

instrument for drawing ellipses;

land a focus pin "marker holder, lincluding van upper and a ,lower section, l lupper holder;

guide chain, a foot terminating each leg or said. dividers, a iixing point and a focus pin on each of said feet, a screw clamp on said marker holder adapted to hold a marker, a marker held in said screw clamp, a swivel joint in said'marker holder above said screw clamp and means on said marker holder for adjustably holding one end of said chain is looped around said focus pins while the other end thereoil is attached to said said marker may focus pins by said chaintov trace an ellipse.

3.. An instrument :tor drawing ellipses comprising in. combination a pair of dividers having jointed legs, an elongated marker holder with a swivel joint somewhat below its middlev point to said marker holder; each leg of said a focus pin `on clamp on said swivel joint, a marker dividers, cachot said feet; ascrew heldY by said clamp,

holder *whereby be guided around saidY marker holder below said' an eye on the lower end otsaid marker.

holder for attaching lone end of said chain, a reel on thev upper end or' said marker holder for winding up the other endroit `said chain, a ratchet en said comprising apair of dividers with jointed` 'legs in combi-nation with a tubular marker holder and a guide chain carried by the reel anda pawlon said marker holder. Vadjacent thereto, Vor

marker holder k; feet terminating the legs of said dividers, a iixingrpointand a focus pin on each of said feet, .a swiveljoint in sait fmarker holder which divides it 'into `aniipper kand lallow-er section, the upper sectio'nfbeing andthe flower section 'being adapted pto carry,V a emarker, a marker mounted'in the lower section oi' said marker holder, a detent controlled reel V:mounted Vin theupper Vsection :of

said marker holder, said reel beingY adapted to wind up oneend of said'chain, the other end thereof being attached to the lowersec-YY tion of` said `marker holder Vadjacent said marker point, whereby said chain may wrbe :looped around said focus pins to guide said marker in tracing anellipse.

5. An instrument for ddrawing, ellipses,

comprising a pair of dividers with jointed legs terminating in flat feet, a iiXing point on each 'of .said feet; a

a swivel joint connecting Athe and Vlower sections. of said marker tion az in the upper end of said upper section; and

a screw clamp on said lower secmarker held byV saidscrew clamp; la pawl and ratchet controlledl reel journaled a guide chain secured at one end to the lowerof said marker holder, with its other end end of the lower section of said marker attached to said reel, sadchaln loop being holder, adjacent the point of said marker, adapted to travel aroundsad focus pins 10 and extending n a loop around said focus while the marker moves on the outer side 5 pins back to the point of attachment and thereof in tracing an ellipse. upwardly through a central bore n said v v lower and upper sections and swivel joint f HECTOR'FALLETTA. 

